I've been watching dramas since June 2015 with Boys over Flowers being my first drama. My favorite genres are historical, slice-of-life, and family, but I watch everything. You'll notice that I don't rate dramas just because I have never found a good way to do it.
With that said, some of my favorite dramas are 1 Litre of Tears, Because This Is My First Life, Bridal Mask, Circle, Comrades, Dal Ja's Spring, Dear My Friends, The Light In Your Eyes, Signal, Six Flying Dragons, and Taereung National Village.
Finally, some of my favorite actors/actresses are Lee Minki, Yoo Ahin, Lee Yoori, Kim Myungmin, and Kim Kangwoo. My favorite screenwriter has to be Noh Heekyung, but I also really like Park Yeonseon.